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Table 3 Smoking status and frequency of leisure-time exercise according to the categorized frequency of common cold

From: Smoking, leisure-time exercise and frequency of self-reported common cold among the general population in northeastern China: a cross-sectional study

Variables Sample (n = 1413) Frequency of common colda P-value
0 (n = 271) 1 (n = 525) 2 (n = 446) ≥3 (n = 171)
Cigarette smoking categories
 Non-smokers 641 138(21.5) 256(39.9) 178(27.8) 69(10.8)
 Passive smokers 476 68(14.3) 163(34.2) 178(37.4) 67(14.1) < 0.001
 Past smokers 82 18(22.0) 30(36.6) 24(29.3) 10(12.2) 0.715
 Light current smokers 113 24(21.2) 42(37.2) 37(32.7) 10(8.8) 0.790
 Heavy current smokers 101 23(22.8) 34(33.7) 29(28.7) 15(14.9) 0.443
Frequency of leisure-time exercise
 Low < 4 days/month 414 63(15.2) 155(37.4) 132(31.9) 64(15.5)
 Medium 1–2 days/week 624 110(17.6) 233(37.3) 205(32.9) 76(12.2) 0.206
 High ≥3 days/week 375 98(26.1) 137(36.5) 109(29.1) 31(8.3) < 0.001
  1. aEpisodes of self-reported common cold in the previous year
  2. Values are shown as numbers and proportions for categorical data
  3. P-values were calculated by ordinal logistic regression
  4. Statistical significance: P < 0.05